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Shibkovite

A valid IMA mineral species
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About ShibkoviteHide

Formula:
K(◻K)Ca2Zn3[Si12O30]
Previously given as K(□,K,Na)2Zn3Ca2[Si12O30].
Colour:
Colourless, white
Lustre:
Vitreous
Hardness:
5½ - 6
Specific Gravity:
2.89
Crystal System:
Hexagonal
Member of:
Name:
Named after two prominent Russian geologists, Viktor Sergeevitch Shibkov (Виктор Сергеевич Шибков) (1926-1992) and Nikolai Viktorovitch Shibkov (Николай Викторович Шибков) (1951-1991), who both spent their professional lives working on the geology of Soviet Asia.
Osumilite Group. A possibly related mineral is known as UM1990-73-SiO:KMnNaZn.


Unique IdentifiersHide

Mindat ID:
7290
Long-form identifier:
mindat:1:1:7290:4
GUID
(UUID V4):
b3a6f10d-d3aa-4662-970b-344b6aa444b6

IMA Classification of ShibkoviteHide

Classification of ShibkoviteHide

9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
SkoIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ShibkoviteHide

Vitreous
Transparency:
Transparent
Colour:
Colourless, white
Streak:
White
Hardness:
5½ - 6 on Mohs scale
Hardness:
VHN50=609 kg/mm2 - Vickers
Tenacity:
Brittle
Density:
2.89(2) g/cm3 (Measured)    2.90(5) g/cm3 (Calculated)

Optical Data of ShibkoviteHide

Type:
Uniaxial (+)
RI values:
nω = 1.561 nε = 1.563
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low

Chemistry of ShibkoviteHide

Mindat Formula:
K(◻K)Ca2Zn3[Si12O30]

Previously given as K(□,K,Na)2Zn3Ca2[Si12O30].

Crystallography of ShibkoviteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mcc
Cell Parameters:
a = 10.505 Å, c = 14.185 Å
Ratio:
a:c = 1 : 1.35
Unit Cell V:
1,355.66 ų (Calculated from Unit Cell)
Z:
2

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0012494ShibkoviteSokolova E V, Rybakov V B, Pautov L A (1999) Crystal structure of shibkovite Doklady Akademii Nauk SSSR 369 378-38019990293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.11 Å(35)
3.830 Å(100)
3.345 Å(60)
3.304 Å(40)
2.940 Å(50)
2.795 Å(85)
2.627 Å(35)

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ShibkoviteHide

General Appearance of Type Material:
Occurs as white to colorless equant grains, to 0.5 mm, resembling quartz.
Place of Conservation of Type Material:
Museum of the Ilmensky National Park at Miass, Russia, and in the A. E. Fersman Mineralogical Museum, Moscow, Russia.
Associated Minerals at Type Locality:
Reference:
Pautov, L.A., Agakhanov, A.A., Sokolova, E.V. (1998) Shibkovite K(Ca,Mn,Na)2(K2-x□x)2Zn3Si12O30 — the new mineral from the milarite group. Zapiski Vserossijskogo Mineralogicheskogo Obshchestva: 127(4): 89-94.

Synonyms of ShibkoviteHide

Other Language Names for ShibkoviteHide

German:Shibkovit
Simplified Chinese:钾钙锌大隅石
Spanish:Shibkovita
Traditional Chinese:鉀鈣鋅大隅石

Relationship of Shibkovite to other SpeciesHide

Member of:
Other Members of this group:
Agakhanovite-(Y)K◻2(YCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
AlmaruditeK◻2Mn2+2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
AluminosugiliteKNa2Al2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ArmeniteBa(H2O)2Ca2Al3[Al3Si9O30]Orth. mmm (2/m 2/m 2/m) : Pnna
BerezanskiteK◻2Ti2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
BrannockiteK◻2Sn2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
ChayesiteK◻2Mg2(Mg2Fe3+)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DarapiositeKNa2Mn2(Zn2Li)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DusmatoviteK(K◻)Mn2+2Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
EifeliteKNa2(MgNa)Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
KlöchiteK◻2(Fe2+Fe3+)Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
LaurentthomasiteK◻2Mg2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
MerrihueiteK(◻Na)Fe2+2Fe2+3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
MilariteK(◻H2O)Ca2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OftedaliteK◻2(ScCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OsumiliteK◻2Fe2+2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite-(Mg)K◻2Mg2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
PoudretteiteK◻2Na2B3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
RoedderiteK(◻Na)Mg2Mg3[Si12O30]Hex. 6 m2 : P62c
SogdianiteK◻2Zr2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SugiliteKNa2Fe3+2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Trattnerite◻(◻)2Fe3+2Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
UM1990-73-SiO:KMnNaZnK(KNa0.50.5)(Mn1.5Na0.5)Zn3[Si12O30]Hex.
Unnamed (Mn3+-dominant analog of Sugilite)KNa2Mn3+2Li3[Si12O30]
YagiiteNa◻2Mg2Al3[Al2Si10O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc

Common AssociatesHide

Associated Minerals Based on Photo Data:
4 photos of Shibkovite associated with ReedmergneriteNaBSi3O8
4 photos of Shibkovite associated with Telyushenkoite(Cs,Na,K)Na6[Be2Al3Si15O39]F2
3 photos of Shibkovite associated with Pyrochlore GroupA2Nb2(O,OH)6Z
3 photos of Shibkovite associated with QuartzSiO2
1 photo of Shibkovite associated with PolylithioniteKLi2Al(Si4O10)(F,OH)2

Related Minerals - Strunz-mindat GroupingHide

9.CM.Agakhanovite-(Y)K◻2(YCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ArmeniteBa(H2O)2Ca2Al3[Al3Si9O30]Orth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05BrannockiteK◻2Sn2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ChayesiteK◻2Mg2(Mg2Fe3+)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DarapiositeKNa2Mn2(Zn2Li)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05EifeliteKNa2(MgNa)Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05MerrihueiteK(◻Na)Fe2+2Fe2+3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05MilariteK(◻H2O)Ca2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite-(Mg)K◻2Mg2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OsumiliteK◻2Fe2+2Al3[Al2Si10O30] Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05PoudretteiteK◻2Na2B3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05RoedderiteK(◻Na)Mg2Mg3[Si12O30]Hex. 6 m2 : P62c
9.CM.05SogdianiteK◻2Zr2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05SugiliteKNa2Fe3+2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05YagiiteNa◻2Mg2Al3[Al2Si10O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05BerezanskiteK◻2Ti2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DusmatoviteK(K◻)Mn2+2Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05AlmaruditeK◻2Mn2+2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05Trattnerite◻(◻)2Fe3+2Mg3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OftedaliteK◻2(ScCa)Be3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05KlöchiteK◻2(Fe2+Fe3+)Zn3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
9.CM.05FriedrichbeckeiteK(◻Na)Mg2(Be2Mg)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05UM1990-73-SiO:KMnNaZnK(KNa0.50.5)(Mn1.5Na0.5)Zn3[Si12O30]Hex.
9.CM.05LaurentthomasiteK◻2Mg2(Be2Al)[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.9.CM.AluminosugiliteKNa2Al2Li3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.10FaizieviteK2Na(Ca6Na)Ti4Li6[Si6O18]2[Si12O30]F2Tric. 1 : P1

Fluorescence of ShibkoviteHide

Bright red fluorescence in short-wave ultraviolet light

Other InformationHide

IR Spectrum:
Bands at 495, 530, 575, 700, 790, 920, 940, 1000, 1048, and 1105 cm–1.
Notes:
Insoluble in water and 1:1 HCl
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for ShibkoviteHide

References for ShibkoviteHide

Localities for ShibkoviteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Tajikistan (TL)
 
  • Districts of Republican Subordination
Pautov et al. (1998) +1 other reference
 
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